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    CVE-2012-2100

    The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before 3.2.2, on the x86 platform and unspecified other platforms, allows user-assisted remote attackers to trigger inconsistent filesystem-groups data and possibly cause a denial of service via a malformed ext4 filesystem containing a super block with a large FLEX_BG group size (aka s_log_groups_per_flex value). NOTE: this vulnerability exists because of an incomplete fix for CVE-2009-4307.

    Published:Jan 10, 2012
    Last Modified:Apr 11, 2025
    EPS:Jul 3, 2012
    EPSS Score:0.00865
    CVSS Score:7.1

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
    http://rhn.redhat.com/errata/RHSA-2012-1445.html
    http://rhn.redhat.com/errata/RHSA-2012-1580.html
    http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
    http://www.openwall.com/lists/oss-security/2012/04/12/11
    http://www.securityfocus.com/bid/53414
    https://bugzilla.redhat.com/show_bug.cgi?id=809687
    https://github.com/torvalds/linux/commit/d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
    http://rhn.redhat.com/errata/RHSA-2012-1445.html
    http://rhn.redhat.com/errata/RHSA-2012-1580.html
    http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
    http://www.openwall.com/lists/oss-security/2012/04/12/11
    http://www.securityfocus.com/bid/53414
    https://bugzilla.redhat.com/show_bug.cgi?id=809687
    https://github.com/torvalds/linux/commit/d50f2ab6f050311dbf7b8f5501b25f0bf64a439b

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High